16655011551651 has 8 divisors (see below), whose sum is σ = 24225471347904. Its totient is φ = 10093946394920.

The previous prime is 16655011551643. The next prime is 16655011551653. The reversal of 16655011551651 is 15615511055661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16655011551651 - 2³ = 16655011551643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16655011551651.

It is not an unprimeable number, because it can be changed into a prime (16655011551653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252348659841 + ... + 252348659906.

It is an arithmetic number, because the mean of its divisors is an integer number (3028183918488).

Almost surely, 2^{16655011551651} is an apocalyptic number.

16655011551651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16655011551651 is a deficient number, since it is larger than the sum of its proper divisors (7570459796253).

16655011551651 is a wasteful number, since it uses less digits than its factorization.

16655011551651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504697319761.

The product of its (nonzero) digits is 675000, while the sum is 48.

The spelling of 16655011551651 in words is "sixteen trillion, six hundred fifty-five billion, eleven million, five hundred fifty-one thousand, six hundred fifty-one".